Improvement in sucker-rod extractors



a. MVSHEFFER.

STICKER-ROD EXTRAC'IOR.

No.181,871. Patented Sept.5,1876.

N, PETERS. PHOTO-UTHQGRAPHER, WASNINGTCN. l (1.

UNITED STATES.

PATENT QFFICE.

GEORGE M. SHEFFER, OF EMLENTON, PENNSYLVANIA.

IMPROVEMENT IN SUCKER-ROD EXTRACTORS Specification forming part of Letters Patent No. 181,871, dated September 5, 1876; application filed May 22, 1876.

To all whom it may concern:

Be it. known that I, GEORGE M. SHEFFER, of Enilenton, in the county of Venango, and in the State of Pennsylvania, have invented a new and Improved Sucker-Rod Extractor, of which the following is a specification:

In the accompanying drawing, Figure l is a side view, and Fig. 2 a vertical transverse section, of my sucker-rod extractor, on the line a c, Fig. 1.

Similar letters of reference indicate corresponding parts.

My invention relates to an improved device for extracting sucker-rods from boreholes of wells, &c.; and it consists of a spring, with toothed jaws that slide in the socket-part of the extractor and bite the rod when properly applied, so as to raise the same.

1n the drawing,A represents the sucker-rod; B, the socket with side slots at, and a springclamp, G, with toothed jaws sliding readily therein. The spring 0 is made ot'inverted V shape, and brought at its upper end in contact with cross-pins b of the socket. The lower pin pulls thejaws of the spring upward when The upper crossthe socket B is carried up.

pin b comes, by the downward motion of the extractor, in contact with the upper part of the spring, and causes the jaws to spread and adjust themselves to the end of the sucker-rod A. The lower part of the socket next below the slots is provided with tapering grooves d, to admitthereadyslidingot'the pointed springjaws along the same. The upward motion of the socket, by the connectingrodscrewed to the top of the same, carries the spring-jaws against the sucker-rod, and causes the tight binding of the jaws and socket to the suckerrod, so that the same may be readily drawn and hoisted from the well-hole. Th us the simple downward motion of the extractor produces the seating ot' the socket or the rod, while the upward motion gives the firm binding of thejaws, and thereby a neat and timesaving device for extracting rods from wells of all kinds.

I am aware that a socket with jaws has been heretofore employed to extract rods or poles from wells not provided with tubes; but my improvement 'is intended for well-tubes and the inside thereof.

What I claim is-- The combination of socket B, having opposite slots a a, tapering grooves d, and crosspins b b with the V- spring 0, toothed and ar ranged as shown and described.

GEORGE MANSFIELD SHEFFER.

Witnesses:

WILLIAM H. CHAMBERS, REUBEN MITCHELL. 

